---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 11/06/20: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:27 AM - Re: Re: Z14 with SDS EM5 ENG BUS (Robert L. Nuckolls, III) 2. 06:57 AM - Re: Dissimiliar metals (Robert L. Nuckolls, III) 3. 08:30 AM - Re: ROTAX LANE LIGHTS PROBLEM SOLVED (Eric Page) 4. 08:30 AM - Re: Re: Z14 with SDS EM5 ENG BUS (David Carter) 5. 08:38 AM - Re: Dissimiliar metals (Bernie) 6. 08:38 AM - The next generation . . . (Robert L. Nuckolls, III) 7. 09:02 AM - Re: The next generation . . . (Ernest Christley) 8. 09:10 AM - Re: ROTAX LANE LIGHTS PROBLEM SOLVED (user9253) 9. 05:21 PM - Re: Broken power terminal (Ron Burnett) ________________________________ Message 1 _____________________________________ Time: 06:27:11 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Z14 with SDS EM5 ENG BUS > > >If I follow this advice, is there a way to turn off both battery >contactors in flight for a smoke in the cockpit scenario? It seems >the engine would need additional electical protection. > Yeah . . . that's why Z101 came into being. Fewer components, robust, dual fed busses. For smoke in cockpit, close battery feed to engine bus . . . shut down all other switches. Bob . . . ________________________________ Message 2 _____________________________________ Time: 06:57:32 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Dissimiliar metals At 10:23 PM 11/5/2020, you wrote: > >Garmin provides stainless hardware for grounding studs for some of >its electronics. Would stainless be a problem for attaching the >grounding forest (brass/copper) to an aluminum airframe? > >Bernie Willis Generally no problem. Dissimilar metals have three fundamental characteristics that manifest in not-so-obvious thermoelectric qualities. See: https://tinyurl.com/pmare2c For the purposes of this discussion, we're interested in the potential for extra ordinary corrosion in the interface of the two materials . . . corrosion that degrades electrical conduction and perhaps promotes structural destruction. This risk moves forward only if there is water (or other ionic fluid) present. The cited Seebeck effect manifests as a tiny battery created by molecular differences in two metals. Not a problem in a dry condition but when conductive moisture is present, electrons will flow through the liquid between the two battery poles. Those electrons MUST come from the more negative of the two poles. I.e. that battery electrode 'rusts' due to the flow of current external to the electrodes. This gives rise to the sacred concept of gas-tight connections. If the void between the potentially antagonistic metals is reduce to zero, then moisture and oxygen necessary to promote atmospheric rust -AND- electrolytic rust cannot enter and the joint is secure. The outside surfaces might show signs of corrosion but the parts that matter are secure in their assembly. Examples of these phenomenon are illustrated by the accelerated destruction of metals in a marine environment. I have visited this example of extreme corrosion on Flamenco Beach, Culebra Island, PR https://tinyurl.com/y33t3a62 Massive volumes of metal have be completely dissolved away into the surf. The short answer is: Stainless hardware does not offer risk if (1) it's not routinely wet and (2) the conducting surface interfaces are adequately compressed to achieve gas-tight joints. Bob . . . ________________________________ Message 3 _____________________________________ Time: 08:30:01 AM PST US Subject: AeroElectric-List: Re: ROTAX LANE LIGHTS PROBLEM SOLVED From: "Eric Page" user9253 wrote: > The Rotax 912iS lane LED lights did not work in my friend's Kitfox. [SNIP] Joe, I hope you don't mind; I re-posted your discovery to the TeamKitfox forum. I wanted to make other Kitfox builders aware, in case the Kitfox factory sent incorrect resistors with more than one 912is installation kit. Thanks for passing along the information. Eric Read this topic online here: http://forums.matronics.com/viewtopic.php?p=499275#499275 ________________________________ Message 4 _____________________________________ Time: 08:30:51 AM PST US From: David Carter Subject: Re: AeroElectric-List: Re: Z14 with SDS EM5 ENG BUS Bob - I'm implementing Z101 now as a retrofit in my RV-7A. Your response reminded me of a question I had. Is there a reason not to operate with the engine bus alt feed always on? And the same question for the aux alternator field? I'm using the B&C standby regulator rather than the Ford regulator since I had one laying around if that makes any difference. Thanks! David --- David Carter david@carter.net On Fri, Nov 6, 2020 at 9:29 AM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > > > If I follow this advice, is there a way to turn off both battery > contactors in flight for a smoke in the cockpit scenario? It seems the > engine would need additional electical protection. > > > Yeah . . . that's why Z101 came into being. Fewer components, > robust, dual fed busses. For smoke in cockpit, close > battery feed to engine bus . . . shut down all other > switches. > > Bob . . . > ________________________________ Message 5 _____________________________________ Time: 08:38:13 AM PST US From: Bernie Subject: Re: AeroElectric-List: Dissimiliar metals Bob Thank you! I=99ll leave the stainless hardware in place. But in the fu ture is the stainless preferred over cadmium plated steel or brass? Bernie Sent from my iPhone > On Nov 6, 2020, at 6:05 AM, Robert L. Nuckolls, III wrote: > > =EF=BB At 10:23 PM 11/5/2020, you wrote: .com> >> >> Garmin provides stainless hardware for grounding studs for some of its el ectronics. Would stainless be a problem for attaching the grounding forest ( brass/copper) to an aluminum airframe? >> >> Bernie Willis > > Generally no problem. > > Dissimilar metals have three fundamental characteristics > that manifest in not-so-obvious thermoelectric qualities. > See: https://tinyurl.com/pmare2c > > For the purposes of this discussion, we're interested > in the potential for extra ordinary corrosion in the > interface of the two materials . . . corrosion that > degrades electrical conduction and perhaps promotes > structural destruction. > > This risk moves forward only if there is water (or > other ionic fluid) present. The cited Seebeck effect > manifests as a tiny battery created by molecular > differences in two metals. Not a problem in a dry > condition but when conductive moisture is present, > electrons will flow through the liquid between > the two battery poles. Those electrons MUST come > from the more negative of the two poles. I.e. > that battery electrode 'rusts' due to the flow > of current external to the electrodes. > > This gives rise to the sacred concept of gas-tight > connections. If the void between the potentially > antagonistic metals is reduce to zero, then > moisture and oxygen necessary to promote > atmospheric rust -AND- electrolytic rust cannot > enter and the joint is secure. The outside > surfaces might show signs of corrosion but > the parts that matter are secure in their > assembly. > > Examples of these phenomenon are > illustrated by the accelerated destruction > of metals in a marine environment. I have > visited this example of extreme corrosion > on Flamenco Beach, Culebra Island, PR > > https://tinyurl.com/y33t3a62 > > Massive volumes of metal have be completely > dissolved away into the surf. > > The short answer is: Stainless hardware does > not offer risk if (1) it's not routinely > wet and (2) the conducting surface interfaces > are adequately compressed to achieve gas-tight > joints. > > > Bob . . . ________________________________ Message 6 _____________________________________ Time: 08:38:28 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: The next generation . . . Saw one of these on Banggood a few weeks ago and had to get one to play with. https://tinyurl.com/y3rlo8hk At first blush, the thing seems quite capable for making good solder joints of all sizes. The cord is a bit 'stiff' which slightly hampers control for tiny ECB parts. I may splice a flexible cloth over rubber cord on it to enhance that feature. The Metcals are still the gold standard of soldering irons but getting hard to find used/surplus . . . too expensive new. My own Metcals are probably 40+ years old. When and if I need to replace one, this new kid on the block may well fill the bill for a whole lot less money! In any case, these are exceedingly reasonable for the performance offered . . . a cheap experiment if you're interested in a versatile soldering tool Bob . . . ________________________________ Message 7 _____________________________________ Time: 09:02:02 AM PST US From: Ernest Christley Subject: Re: AeroElectric-List: The next generation . . . For those not familiar with Banggood: https://www.amazon.com/Adjustable-Temperature-Controlled-Thermostatic-Elect ronic/dp/B089SKWMPT/ref=sr_1_12?dchild=1&keywords=soldering+iron&sr =8-12 On Friday, November 6, 2020, 11:39:39 AM EST, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: Saw one of these on Banggood a few weeks ago and had to get one to play with. https://tinyurl.com/y3rlo8hk At first blush, the thing seems quite capable for making good solder joints of all sizes. The cord is a bit 'stiff' which slightly hampers control for tiny ECB parts. I may splice a flexible cloth over rubber cord on it to enhance that feature. The Metcals are still the gold standard of soldering irons but getting hard to find used/surplus . . . too expensive new. My own Metcals are probably 40+ years old. When and if I need to replace one, this new kid on the block may well fill the bill for a whole lot less money! In any case, these are exceedingly reasonable for the performance offered . . . a cheap experiment if you're interested in a versatile soldering tool =C2- Bob . . . ________________________________ Message 8 _____________________________________ Time: 09:10:29 AM PST US Subject: AeroElectric-List: Re: ROTAX LANE LIGHTS PROBLEM SOLVED From: "user9253" Thanks Eric. My friend purchased the engine 5 years ago. Hopefully Kitfox found and corrected the error by now. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=499280#499280 ________________________________ Message 9 _____________________________________ Time: 05:21:34 PM PST US From: Ron Burnett Subject: Re: AeroElectric-List: Broken power terminal Thanks. Sent in for repair. Ron Burnett May you have the Lord's blessings today! Sent from my iPad > On Nov 5, 2020, at 8:01 PM, Charlie England wrote: > > >> On 11/5/2020 7:23 PM, Ron Burnett wrote: >> >> I over torqued a #6 power terminal breaking most of it off on a dual unit fuel pump. I did get the ring, lock washer and nut on anyway, but... >> >> Are there any fixes? >> >> Thanks, >> Ron Burnett > Bummer; I know that hurts. > > A bit more detail, like brand/model & maybe a pic or two, might help us help you. > > Charlie > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.